▎ 摘　　要

NOVELTY - A graphene hydrogel comprises pores between laminated graphene sheets. USE - Graphene hydrogel for preparing graphene hydrogel nanocomposite material and article such as an electromagnetic wave shielding material, a wastewater treatment reagent, an electrocatalyst material, a cell growth plate, a graft material and an energy storage device (all claimed) such as a secondary battery, a fuel cell and a super capacitor, a filtration membrane, a chemical detector, and a transparent electrode. ADVANTAGE - The hydrogel has improved electrical conductivity and ion transport ability, large-area, high mechanical strength, high elasticity and high transparency. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a graphene hydrogel nanocomposite material (2) a method for preparing a graphene hydrogel (3) a method for preparing a graphene hydrogel nanocomposite material (4) an article manufactured using the graphene hydrogel.